Journal: BMC Biotechnology
Article Title: Novel fusion proteins for the antigen-specific staining and elimination of B cell receptor-positive cell populations demonstrated by a tetanus toxoid fragment C (TTC) model antigen
doi: 10.1186/s12896-016-0249-x
Figure Lengend Snippet: Binding analysis of recombinant SNAP-TTC-BG647 on polyclonally activated CD19 + B cells. CD19 + B cells were isolated from leukocyte filters by density gradient centrifugation and magnetic cell separation with anti-CD19 beads. Isolated B cells were activated by adding 2.5 μg/ml CpG and 50 ng/ml IL-21 to the cell culture medium. On day 4 of cultivation, the cells were analyzed by flow cytometry. Surface a and intracellular b staining with the recombinant SNAP-TTC-BG 647 (1:25) was performed
Article Snippet: The staining was performed with the following monoclonal antibodies against the human B cell specific surface markers CD19 (Becton Dickinson; Catalogue number: 560911), CD27 (Becton Dickinson; Catalogue number: 337169), CD38 (Becton Dickinson, Catalogue number: 345806) and biotinylated IgD (Becton Dickinson; Catalogue number: 555777) in combination with streptavidin Alexa-Fluor 680 (Life Technologies; Catalogue number: S21378) in combination with the recombinant TTC protein followed by an Alexa Fluor 488-conjugated anti-penta-his antibody (Qiagen; Catalogue number: 35310).
Techniques: Binding Assay, Recombinant, Isolation, Gradient Centrifugation, Magnetic Cell Separation, Cell Culture, Flow Cytometry, Staining